Typewriting machine



1943. w. A. DOBSON 2,328,376

TYPEWRITING MACHINE Filed Jan. 27, 1941 8 Sheets-Sheet 1 Mil/0K4 005504 ATTORNEY Aug 31, 1943. w, DOBSQN 2,328,376

TYPEWRITING MACHINE Filed Jan. 27, 1941 8 Sheets-Sheet 2 INVENTOR Mil/r7 4 00350 BY ATTORNEY Aug. 31, 1943.

w. A. DOBSON 2,328,376

TYPEWRITING MACHINE Filed Jan. 2'7, 1941 8 Sheets-Sheet I:

INVENTOE ATTORNEY 1943- w. A. DOBSON 2,328,376

TYPEWRITING MACHINE Filed Jan. 27, 1941 8 Sheets-Sheet 4 INVENTOR lV/Zl/fil/ a 00550 ATTORNEY Aug. 31, 1943. w. A. DOBSON TYPEWRITING MACHINE Filed Jan. 27, 1941 8 Sheets-Sheet 5 INVENTOR MZZ/fl 6. @0850 BY 6 ATTORNEY Aug. 31, 1943.

WA. DOBSON TYPEWRITING MACHINE Filed Jan. 27, 1941 8 Sheets-Sheet 6 INVENTOR lV/Z 1/19 008504 g- 31, 1943- w. A. DOBSON 2,328,376

TYPEWRITING MACHINE Filed. Jan. 27, 1941 8 Sheets-Sheet 7 Jlllll [Iflfl .JHHI IIIIH 253 i: .26 E: T :5 II 6.9

INVENTOR Mil/1941600550 Aug. 31, 1943. DQBSQN 2,328,376

TYPEWRITING MACHINE Filed Jan. 27, 1941 8 Sheets-Sheet 8 :5 Illllllllilllfllllllllll INVENTOR lV/ZZ/i/l/ d 00550 vcrement of carriage'travel. i i A margin-stop mechanism fortypewritingma i Patented Au 31, 1943 172,328,376 j 'TYIPEWBJTING m m WilliamAiDobson, Wethersfield, Conn assignon ,to 'Underwood Elliott Fisher, Company, New,

I York, Y., a corporation ofpelawa re Application January 27, 1941, Serial he -1376,045

10Claims 1:1' 7f o i t This invention relates to'carriage-stop mechfor typewriting machines, and more par- ,Yticularly to margin-gaging mechanisms having provision ,for key setting of margin-defining stops selectively at substantially any letter-space inchines, embodying the desiderata in margingaging devices, from the standpoint of simple operation, convenience of keyboard'control andthe economy afforded by a; minimum number of parts, .pre1erab1y includes a series of letter-spaced stops -of identicafform in a jcontinuousarray throughoutthe range of carriage travel andastop-setting mechanism operabie byakey at the typing keyboard, having asingle stop setter operative at a station in fixed position relation with the printing'point ofthe machine to set any one of-the i stopspositioned at said station by carriage move ment. In that stops of identical tormare prefer ably employed which stops assume-identical positions when set, a single; prescribed path is defined by travel of both the right and left margindefining stops. A single counterstop is arranged in said path and adapted to beengaged respec tively by the right and left stops at the correspending opposite faces of the counterstop. The

provision of a margin-gagingmechanism of this character, ,havingakey-operable stop-setting mechanism and stops of identical form through out the range of carriagetravel, entailseertain problems in stopsetting to adapt any selected one of the stops foreither 'right hand or left-hand margin gaging.

In'view of the foregoing, one of the objects of the present invention is to pr ovidea margin-stop mechanism including simple and reliably operaitive means'by which a selected stop may be rendered eiiective for either left or right-handmar- V mgagingw f 1 Another object is to provide ,a keysettable margin-gaging mechanism in which a series of stops 01 identical form throughout the range of carriage travel are employed including mechanismresponsive to the directionof carriage travel, for adapting. a set stop for either left or righthand margin gaging.

A further object is to provide means associated withthe counterstop of a key-settable marginstop mechanism, bywhich thenorrnally effective counter-stop is moved out of the carriage-stop pathat the instant of stop setting, and is automatically released intosald path upon movement of the carriage in eitherdirection, the sideoi the counterstppfiatwhich the set stop is rendered eflctivebeing determined by the direction in which the carriage ismoved after stopsetting, thereby adapting a set stop selectively'for either In its "ore specific aspect the invention provides a=series*of 'stopsarranged 'at letter-space ini tervalsonthe carriageahd settable selectively according to the position of thecarriage, by a single,

'10 key-operable stop setter. The stopsmay beidentical in shape and arej-settabie to identical margin-definingpositions"for cooperation with a eounterstop A retractablemargin counterstop is normally dispos'edin thepathofthe set margm stops, any two of whichat'dpposite sidesoi the counterstop may define a line length ofcar riage travel; member (n-buttress carried on the counterstopis arranged to he engaged by a stop being set, sothat ilfi settihgjthe stop, the

.3 oounterstop'is retractedgbut of the stop path and isfso held whileithecarria'ge remains stationary.

"Upon moving'the carriage rightward, the set stop moves tothe right oi the counterstop, riding off the buttress and thus releasing the counterstop :23 to efiectivepositiori at the left side of the stop. 7

fThereaiter, said step, its-lateral relation to the counterstop; willflfunction to limit leftward a carriage travel; and thusdefine the right-hand marginfor'fline-end position offthe carriage. Upon'moving the'earriage leftward after stop S t n th MSi-OP rides off the buttress left- 7 I jwardly to release the c unteistop at its right side, aid stop thereafter functioning to define the left- "hand margin 01' thedine-start positionbf the l5 carriage.

The invention isillu'strated and described hereininponjunction with a combined margin-gaging I jandtabulator mechanismpforming the subject [matter of my copending application, Serial No.

40371622, filedDecember. 1, 1940. Reference is also made tomy copending application, Serial No; 376,046, filed January2' 1,v 194 1, in which the margin release-and restoring mechanism to allow typing beyond the normal line' ends, forms the subject matter described and claimed. As ,afore indicated, thesubjectmatter oi the present ap 'plication embraces the features of the invention .by Whieh -a, setstoplis adapted selectively for either righteorleft-hand margin gaging ,by ap- Q propriate movement of the carriage. X

t In the. drawings:

combined argin-gaging and tabulator mechaoftheinve'ntion. i

Figural is a perspectiveview illustrating the figure} isga yiew similarto Figure 1 but illustion to set. a margin gaging stop;

margin-gaging mechanism, omitting other associated mechanisms to facilitate illustration Figure is a transverse sectional View of the of Figure 4.

Figure 6 is an enlarged front elevational .view

of the tabulator mechanism, showing also the stop setter and restorer elements; withassociated mechanisms omitted to facilitate illustration.

Figure '7 is a transverse sectional view through the tabulator mechanism, takenon the staggered line l ,--l of Figure 6, but omitting the stop setter.

Figure 8 is a fragmentary elevational view illustrating the stop-esetting 'rnecha-nism inopera- Figure 9 isfa fragmentary,elevational View illustratin'g the stop-setting mechanism"operated to set a stop for tahulating.

Figures .10 and 11 are views supplementing Figure 8,;shown-ig the two positions ofaset stop relatively to the margin counters top upon movement of the carriage -;in each direction, subsequent to stop setting. I Figures 12 and 13 areelevational views relating respectively to Figures and 1-1 and illustrating the coaction of the right and left margin-gaging l stops with the margi-n counterstopin each direction of carriage movement; I

Figure 14 illustrates the operation of the stoprestoring mechanism to restore a series of stops set for tabulating, during a carriage-run.

Figures 15 and 16 supplementF-igurell Figure 15 shows a "margin-gaging stop abutting the stop restorer without disturbing the former during'a carriage run to restore thetabulator stops, and Figurelfi shows the stop restorer in readiness to restore amargin-gaging stop. 3

Figures 17. and 18 are similar views illustrating --the margin-release mechanism operated to allow for typing beyond a margin and show, in Figure 17; the mechanismxin initially operated position after depressing the-margin release key, and in Figure 18; the final position of themechanism after release ofsaid key. l

Figure 19 shows the'margimrelease mechanism in the initial stage o'f resto-ring the counterstop for its normal margin-gaging function, after typing beyond the right margin. s Figure 20 is a view similar to Figure '19 but illustratingthe initial stage of restoring th'e'counterst'op and after Jtypingbey'ond the left margin.

- Figure 21 illus't'ratesthe 'tabulator m'echanism .Operat'eol to institute earriagerun, with a set a tabulator stop approaching engagement with the v. raised tabulato-r counterstop.

Figure 221s aiplan view or the letter-feed escape'ment mechanism. also showing portions. of

,the mechanisms 'forlinelocking and carriage reg lease, and,

.Fig'ure 23 "is a iragmentary' front elevation of 'the escapemerrtmechanism Referringn ow m "e particularly to Figure? of the drawings. ac'ai. age, if] includes spaced end members ii that are rigidly connected by a carriage barlZ. A platen cylinder '13 extends parallel to the carriage bar i2 'andis 'rotatably mounted in the end members H. The carriageis guided for line typing and return movement on track-.

ways M supported on themain frame- I 5 "0f the machine. A spring drum Hi moves the carriage in letter-feeddirection under control of a letterieed escapement mechanism H which includes a I rocker l8 carrying dogs which cooperate with an margin-gaging mechanism, taken on a line 5-5 known kind. and may include type bars 23 that are movable against the platen lit by type keys in thev usual manner.

The escapement is operated by engagement of the type bars 23 with a universal bar 24 t rock the dog rocker i8 on its pivot 22 at the actuation of the ty e keys, in the wellknown manner. In consequence of each type key operation, the carriage is adavnced step by step Serial No. 369,467, filed December .lil,.l9 i0,:now

Patent No. 2,317,183, issuedv April" 20', 194-3. Briefly, this organization includes a series of lete'r-spaceol, key-settable stopslfi slidably supported on a rack bar 26 mounted cn'the carriage end members ll. A detent spring 27.. extending along the rack bar, coacts with 'each of the stops to yielclably hold same at retracted, inefiective position, or at either. of two effective? positions, each stop having a series of 'det'eritf notches clefining said positions. a i q The lower end of each stopiifi presents two laterally related tabs 228;29 offset'verticallyfrom each other. As shown more clearly in Figure 1, these tabs are "each adapted toengage' with oer-- tain counterstpps when set'to certain'positions.

When a stop islowoi'ecl the full extent or two notcheathe stop is set formargin gaging, the

' tab 29 being disposed to. engage a margin counterstop '30 during carriage' trayel. ffhen the stop is lowered half way 'or one notch, it is set to define a tabulator station, the tab 28 there'cfbei'ng adapted to engage a tabulator counterstop 3i when the latter is raised fron'rinefiective position during atabulatin'g operation.

Stop setting The. stop-setting mechanism includes a stop setter 33 mounted for vertical" movement and the carriage at the moment of stop setting.

lower end of the stop setter 35 isfiexibiy concarrying afinger E l at its upper end; arranged to overlie the series of stops 25, this finger being adapted to engage any one of said stops-posh tinned thereat in accordance with the positionoi The nected to an arm 35 axes on a rock shaft [forwardly to the keyboard of the machine.

Aspring Q5, acting on the stop setter tiyieldably holcisthe setting mechanism-in normal, in-

active position at which the lever i? engages a member 35 on the machineframe, Figures '8 and 9. Astop-setting key il is carried on a stern l'li'pivotediat lt on thel'cver arm l l adjacent the forward end thereof. The key stem is projects downwardly and provides .a gaging stop 5t at its lower end adapted to engage a memberfil Thekey stem Q3 includes sigles of thestem pivot 49 and adapted to engage "*yieidabi holds the k ey 'stem 'lh nonnalyupright t he arm-14. 111 said position he gaging "stop- 50 comes iiitoen'gagementwith'the member 5! "when ward. By such operation, the sto sette'rziis n el e w in -;I- zu .e;9 a i er. em n sssina heey sr iz lh ss downa warlily and alsourgediorwarcilm against the tensioh ;of spxingttJux tnuug 53 {engages the lever h 1 arm H therehy hiovi g thegaging stop 50 to a m t q cl a he mber I -i r ra i W the stop-setti g key in; this rnanner, -a s;,iilus- 'trated in Figurefi, the stop vsetterjii isiow ered in that? ex nt ide m iq ibmn e t l ever a 44 withthe member iilga ci thus moves 4 t qr sv qinsdeeree mar en ne 1 the, plate 38 by a studandslotv mountih 58.

emher 61f plvOtally pcarried' on th e shaft SBl and f p'bsition' defined by the "engagerrierit of lug fl with 1 ing same after-setting anyone or thestops for margin gaging'ythe carriage' may be moved to-thelett,

putting the set stop; at the left ,of the: margm j counterstop' 30, 'so that" said 'stop' willthereatter determir e the bgirinihg of-line position i of the carriage; Inversely, whenthe carriage is moved to the right after: stop setting, the set wstopvis :positioned ori the right-side oi' the counterstop fordetermin'ing theline endiposition of the carriage. "Thus; alternative relative positions of the set stop and thefi eounterstop"are determined by moving the carriage in the .h v appropriate directhan after 'setting th'e t p i r i As shown more'fclearly in Figures 2", ii -end; 5.

i the margincounterstop 30 mounted for upand-dowh and lateral movement; A s1ot |2,a'd'- Jacent the lower end otthe counterstop'ri'deson a stud" carried on-the piatell8'; Asprin'g M yieldahiy holds the couxiterstop inlnormal; raised -is in thepath of the m'arginset stops to inter cept the tabs29 thereofu Thecounterstop'may ,i Y r e 1 =1 oscillate about thestud 13laterally,rthat isfiin The stobqestorihg r'nechanisfi uiheludes a stop restorer 51 guided for 'up-and-dowhmoveme t on position; deterniipedsby eng'agement of the end of slot 12 with the stud 1 3: 1' In said raisedi pm sition, a projection: on the countersto'p fl the plane 'qf carria'ge movemeht; between certain limits which determi-nek two effective" positions terstop 30 and other elements associated th'e're-' 11., ncl d ng jaJsec ne rm 162, connected by a link as plate Y be. machineqand i ppe'rferid of the stopgrestorer W51 f. carries a pro ejecting portion 68 presenting a mihjclined f see, 69- ahd a horizontal face 10, the (ace 69v rising in carl IIage-retum direction. 1 h

I; ".Thefoperatiohof the stpper'esto z gfmehenisin to restoreang set tabujiating. or lmarginegaging "Jl stop 'i diviq ualiy, or restore; all of the htabulator 1 'stopskiuringa carriage run, is illustrated inFigures '14 to 16. Toconoomitantiyljrestoreail'of "the Set tahuIat rQstQps; the, carriage is brought h r q t line-e j s n ls byfbar kim; a a n t h rightf-handmargir stop; ,"Therestorer butto'n fi l is jth er pressed an dheid dowr whi the carriage is actuated through ,a 'returri movement. fAs shown in Figure 14, eachtabuisitor .stopj comes with," and has two bent-off lugs: 11, 1 s -lad-apted to be engaged bytheisides of the counterstop "when the latter is swung" to either "of 1 said sitionsf The spring [4, acting On: an oflfse't 'arrn 1-3 10!the counterstopSli -exerts itsiorce in such 1 i direction as to holdthe' couriterstop in normai, upright positiomagains'twhelug 11, see Figure 131, in which position thecounterstop remains whezi arresting the-carriage imrightward travel,

;at;theybeginriing o fatyping line; In arresting theg carriage in line-encl position, the marginasesnev q t me t ed 1M i eww t rsttm- 30;, causes 1thexcounterstopto swing against the lug 18. swi gi-ng movement is employed 1 to operate a linelock device, hereinafterhescribed, hut-is primarily intendedtowassure a V eorrespondin l rrest-h position of the margin gaging stop 25 whether functioning" for left 0r -right ma ns-eas Thisdm i om h iee t a ferried toraa'the; fistop station isw-thatat iwhichr I ringer It} anci the? stop restorer *face 10 arealso disposed- S045 toset or restore restoration'of any stop individuaily; whether for tabuiating or 'margmeagmg, maybe eiiectegi by "first banking the fcarriagefatj the position of the stopto be restored Said stQp -isthus positioned directly over thefhorizorrtal face "lot the stop restorer, as showriiri Figure *ar o; b fpres'sihg therestorer button 54, 'the face;llhisbrought to ineffective positiohih t e Tees; 1 I v Maraiirt stop s e l eotion top set 'fbr mar ns-ga g "m 1 either as a left-hand stop' to deterniirie the be- 'againstthe' bottom edge of the stopjra'isirig same "glnmng-oI-line position, or ask. right-handstop 5 to determine the lirieeend 'position of thecarriage. The selectiori of this alternative function it! the set stop is made iziy selecting -the direction "which the carriage is moyedgfoliowing the i "margin stopse'tting operation. ln other words,

yond said" movement. 1 r 1 i any; Z 1, brought toi that statiorx by 1 carriage As af oreindicateri, is pfovided which a set margin stop majrassume its-effective position atieither sid of ;themargin counterstop 30. A buttress ilil is pivotally mounted ou the station? I wit the counterstob an in its hor'fiial tress isarcuate on a radius from its pivot center K tres'sfih is yileldably held in normal position by a sbrihgTlH 'ir terposed between a lower ar of edge of the'counterstoph :The function and operation-o fithe huttres's 'f all Min setting the stobs for margin gagir' g Y is i illusmains inactive,

trated in'; Figures 8, l1. 1iAt- ,the moment of; setting a;-'stop, the margin counterstop 99 is in its. normal, rightward position, and th buttress isiniits normal, leftward position, projecting'into-the, fstop' station?! As the" stop setting mechanism is operated, as shown injFi'gure 8, to

' setnastop formargi-n gaging,-;the stop. being low- I cred engagesthe buttress 80, and the countera stop 39 is? thus retracted'to thefpositionshown in fulliline, against the-tension of spring .4-; .If the set .stop'is intended for-"right-hand'margin gaginggthecarriage ismovedito, theyrightg and the set stop, riding along the topedge of. thebuttress is thus released :to normal position,- with the stop to the; left :of thelprojection The buttres at is" pivotally lmcunted in order that 'samenney swing out of the-way whenthe mechanism fun tions,to' gage a left-hand margin, ;se'e Figure 13, -so;that the left-handistop may directly engage the margin counterstop.-. For right-hand margin gaging, thebuttress remains in normal position, while the margin counterstop 30, carrying the V buttress With'it, swingsstothe position shown in "Figure 12. By this,IJIIOCEdLHQ SIfSiJOD259 18 set for margin gaging adjacent each'end of the parriage anci defines a line-typing 'zone between these steps, into which zone: the c-ounterstop projects for interception of the margin-gaging stops 5 moving withthe 'carriage in either-di- Jrectiorn- -tatd-thaj f I e, The mechanism for] signalling the approach I of a typingline end is shown F igure fll A lever 84 pivotedon'a stud 85 carries-a hammer 86 adapted to 'Istr ike a'bell 91. An arm of the lever pivo-tallycarries'a tripper' dog 88 weighted to, n r 'e rest in t I tj fa'fi h its 1 9 portion projecting 'into the path or thema"rgir1 'stops25 A spring 90 urges the lever to the bell-strikingposition shown, at which a lug 9l engages the *plate 311'; Thedog 88 is positioned a suitable number'oi-letter*space's ahead ot the counterstopjtl'and, a's'the'right-hand stop 7 25 leftward in line' typinggit engages the inclined'fa'ce of the dog 88, ra ing'the hammer 89 and then releasing"same tostrikfethebell under'influence of spring "90. =During' carriage return, the dog 88 is swung clockwisebythe passing margin stop fi pwhile thelever rei e. im fi w flhe mechanism for locking the, machine; at the end of a,; type line isshownbest inFigures 3, 4 and 2 2. I As previouslydescribed; the counterstop 39. is swung to thepo'sition shown in Figure 12 when thefoarriage isarrested at the typing line end, which movement opcrates the line-lock mechanism, A lever 93, Figurefi, is piv- 1 otecl at 94 on the bracket plate .20 and has a yieldable end portion or spring 95 engaging the l'eit side of the counterstop 30, see Figure; 22; Lever 93 reaches through an aperture in the plate 2i] and carries -a lug 96,, During line typing, the dog rocker- IB is oscillated :onitspivot 22 for 'theletter-feed control of the carriage. The counterstop 39, being in its normal upright p'osition Figure l3, lea-ves the lever 93 in normal.

,ineffective position at,1w1 1ich,lug. 96 is free-of the'dog rocker Hi, the lever 93 being restored to normal position by a spring 91.:-- As the counterstop 39 is swung to the Figure 12 position, lever 93 isactuated and the lug 96 thereof is brought topositionto obstruct the dog rocker, thereby I holding the universal bar-24 immovab1eand preventing the type;bars' 23 frorn completing a typing stroke. '5 p v Margin release When it is desired totype beyond either margin,'a margin-release button 98 is f depressed,

which retracts the margin co'unterstop '39 from the path-of the margin stop 25' 'to permit passage of the'latter to the opposite sideof the 'oounterstop; As shown in Figures 1 and 3, a

push rod 99 is issuing from the release button 98 is flexibly connected to an'arm I90 of a rockable member I 0| rotatably mounted bytrunnions "journaled'on the main frame and a bra'cket hangmg the Plate F gure 3. 'A second arm I92 of therockable member is loosely engaged at its free end in a slotted ear I03 at thelower end of the margin counterstop. As the button 98-is pressed, the arm I02 swings downwardly, thus retracting the counterstop fromffective position.

Mechanism is provided for holding the coun- V terstopretracted during margin typing, and for ffautomatically releasing the. counterstop when the carriage is restored to the line-typing zone.

A resilientlatch member lll5', preferably'in the iorm of a flat spring, is mounted-for pivotal and endwise movement byafhe'ad'ed stud. I95 se- 'cured tothe latch member and engaged in a ver-' fltically elongate slot ID! in the bracket 16.

' tension spring Hi8 yieldably holdsthe latch memher down, with the stud IDEbOttOmiHgiTIIhQ ',slot. The spring Hi8 is arranged tofexertits force .on the latch I05 in a substantially. perpendicular line from the center of stud'lflfi so as to .yieldablyhold the latch in a normallyupright 'position,'fsee Figure 4. The lower end of the latch its is bent at an angle inclining toward the cou'ntersto-p 39 to provide a bevel H19.

1' As the counterstopis 'retrac'ted a catch H0 thereon, Figure I 5, 1 cooperating with the bevel ;Iil9,,flexes the latch I05 outwardly until the catch Hi? is engaged undergthe bottom endof the latch This conditioner, the mechanism is illustrated in Figure 17 and is a result'of press- .ing the release button 98, before releasing same,

and may, follow from either condition of the stop mechanism shown in Figures 12 and From the Figure. 113.,position, the counter'stop 39- is ,merely retracted until latched down, without varying from its upright position. When the .counterstop 301s positioned as at Figure 12, the line-end-defini-ng position, 3 the initial retraction of the oounterstop withdraws same from the margin stop, immediately following which the counterstop assumes an upright position against the lug H, under influence of spring Hi; Further retraction of the counterstop completes the latching, as described. When latching is completed, a-s shown in Figure 17, the

a button as is released and the ceunterstop is pulled upwardlyby its spring, 1'4, carrying with it the latch I95. It may be here. noted that-in re- 7 tracting, the cqunterstopis' lowered a distance twice;that,necessary to clear the marginqstep 25"? and that the clearanceafiordedby the slot liilis equal to only half theretractive stroke of the counterstop. When the counterstop is V inactive-position. I. I ,I

raised afterlatchingthe stud I06 engages me 18, III; will be noted that the spring I4 is relatively stronger than spring I08 so as to Iover-I come the tension of the latter in raising the latch I05, as described;

To complete the margin-release operation when the carriage is at line-end position, it is only necessary I to press and release the button 30,Iin that the counterstop, having been in the posite side ofthe counterstop. This mode of operation, :however, is desirable in that the carp p p I the, ,upperend of the slot andthus gages-the posi-f I tionof thecounterstop sothat itsIupper endis I I still below the path of the carriage stops, hav I ing been raised} only half its retractive stroke. I

The upper end of the latch I05, however, is now I34, has one end engageablby a forked portion 1 projectingintothe carriage stop path,IIsee Fig:

of the plunger I3I and carries a brake shoe adapted to he brought into pressure engageme t; with astrap I36 secured to the stop racl; bar liI; Ito retarqfearriageftravel during trie tabulating'I V riage should bemovedto its rlghtward I limit for I anyltyping in the left-hand margin,

.To restore the carriage to'within' the line ts p stopI;thus,engages the upper endof in: z'onegthe carriageds moved from either or the margin-typing positions and thestop 25 2 is I thus carriedpast the'retracted-counterstop 30.

the11atchI I05, swinging same laterally on itsps tud I06 until the catch IIII is freed from the bot- I tom and 0f! the latch; see Flgure 20; The com-- terstopxilfl is thujs:releasedto be "restored byI its I sprln'g 'fl 'to its normalyraised position in the path for themargin stops. When clear of catch- I II0, 1ath I under influenceof its spring I08,-i sI pulled downwardly: until the'stud I06 bottoms.

in its "slot, the sprin'gf I 08 also acting to restore the latch to normal, upright position. :The ac- I tion of the mechanism in tripping the latch-is substantially" the same whether restoring the I carrlage from the left. or right margingtyping P sition. 1 .I:: I I II I I I I I raises the manner counterstop 3I to effective I positioninthe path'of the carriage stops. As

shownin-Figure l; thekey II2;is carriedon a I IIlgto an arm I5 of a rockablemember IIO ro-- tatableon the shaft 36-. AI spring I I1 acting on I the member I I Frestores themechanism to norof plate; Figures 6 and 7; -A forked portion of I I 45 r ei camage is tabiilated to each col mh o I I I Is1ti'onatwhicha stop' 25 has been set for tabu-f I I lating; bypressing atabulatorkey I I2 which re- I leases the carriage for a tabulating' run and I I therefore, aDP TLoachingfthe-I presses against the brake plunger ear l30,Ifox-in.-'

ing a yieldableconnectionbetween DhGIGO lLmtEIQ I I stop 3| and said plunger. IA leverI I33 pivoted at run and 23; I

3| to tabulatorI-stop-inteiceptingposition preparatory to banking the Icarriagejajt the column determined by"thejjsetltabulatorstopffi In'the; tabulating rungt iear riageis moving leftward, p I I as indicated bythe iari iow and? the stop 25? is, p v v 'uriterstop. *Asjthe r a'seli sd. the rais nsiojf t e counterstop elgactua es; the flor -Ike "mechanismfin that I the resultant I'ctnnpressi'o'n ,ofspririgjgISZ presses; b a e-I I1 5 a i t e DL IS KT .26 T 2 retardf I the momentum of the carriage;

release or. the tabulator ey I I2, t e counterstop an is retracted; by spri I; thus releasingthe; brakemechanisnr and atfthe 's'ametirne *restor-[f mg the carriage to'the ontrol'of theletterefeed mechanism by releasi t -t aw ng db jm.

he clii e I 5 thu e t neq or su lc sd: I i Itabula-tin qne je iom r im h lli ype n b k nsj hejQarr aeJa Ibeect irco I a a mne t II I counterstopi 3 I which! in projectedfposition; is I ked by imi m r IZII I t e I ckt at I h Powe l the cpu erst nfl w t wni hj ei a i ulatoi" stops fengageis neo'essarilybf a minimum widthto engage betweentwoadjacent seflstops.

I This engaging portionisi'therefore; in thfe fornr the tabulator stop-imparts a he of a thinprojectlbn I 43 which, ass'hown in Figure the bell crank cooperates with a roller I23 car 'I I ri'ed the tabulator counter stop 3| and pr'o- I iectin glthrough an elongate slot I24 in the plate,

I wfiich'slot aflords d'guide for the counterstop deterrnines {its I normal :and projected I positibns Thejcounte'rstop is further guided in an I unand-down' dire'ctlon by a. sliding contact1 edfie wise" with the stop restorer 51,,Iwith whichIIit is; coplanar? relation. I A spring I 25 I restores tli ounterstop il and a' bell crank'aIZI to'nor-I eG'u'nterStop 3 I incl {a threaded ear I lfl earrylng ascrew lfl ifrom whicharod I28 t il b ltnp tifie iif the e ine thatthe;

,Dmp iat I inovenientf ofI; the 'carr-iage. Said s; la n mbo i in It eIb sIIB II i 9 1: on with Izthezmars r eqel m rfl i wmm $951399: asi sle s r es ififiqb 1 h hm il Iide fl alI: shevmh u hql t the e t n i projects through an ear I30 of abrake plunger .I I3I. Aspring I32; backed IIby thels'crew I27;

e side'oj;theplate mern I cldent to carriage travel, to free the counterstop for restoration into the stop path selectively at either side of the set, stop, depending upon the direction of carriage travel after stop setting.

9. In a typewriter having a reciprocatoryf letter-feed controlled carriage, in combination, a

series of selectively settable stops arranged at letter-space intervals on the carriage for setting to effective position, key-operable means for setting any one of said stops, positioned by carriage movement, at a stop-setting station, a counterstop normally urged to effective position in the path of the set stops at one side of said station, a

member pivoted on said counterstop and yieldably held in normal position at which said member projects into said station for engagement by a i stop being set, saidmember being efiective to retract the counterstop incident to stop setting and to free the counterstop, upon movement of the, i set stop incident to carriage travel, for restoration into the stop path selectively ateither side or the set stop, depending upon the direction of carriage movement after stop setting.

letter-feed controlled carriage, in combination, a series of selectively settable stops arranged at letter-space intervals on the carriage for setting a to effective position, key-operable means for set- 10. In a typewriter having a reciprocatory,

ting any one of said stops, positioned by carriage movement, at a stop-setting station, a counterstop normally urged to effective position in the path of the set stops at one side of said station, a. fan-shaped, buttress pivoted on said counterstop and having an arcuate edge overlying the coun- Hterstop end, means yieldably holding said buttress innormal position at which the arcuate" edge projects into said station for engagement by a stop being set, to thereby retract the counterstop from the stop path, said buttress being effective to-hold the counterstop retracted until movement of the carriage after stop setting moves the set stop out of the station to either side of the counterstop, to release the counterstop for restoration into the stop path selectively at either side of the setstop, depending upon the direction of carriage movement after stop setting.

WILLIAM A. DOBSON. 

